"They will hack into your computer, find out that you used one of the online services, and then they will file your taxes for you asking for a large refund and to apply that refund to a special credit card, their special credit card, which only they have," he explained.

"You then go to file your taxes and find out you've already been refunded $10,000," he said. "You see how that works?"

"Then, you're going to say, 'That's not my taxes,' and they're going to say, 'You're going to have to pay back the $10,000,' " he added.

When it comes to cyber security for businesses, the West Virginia Republican explained that hackers can be attacking a business computer system for more than 200 days before they are detected.

"That's seven months they've already been able to go through all your files, information and everything about you they're going to get before they're caught," McKinley explained.

"Likely, you won't catch them yourselves. You will be notified by someone that says your computer has been hacked," he added.

At this point and one of the main problems is that there really isn't "good advice" for Americans on how to properly protect themselves from cyber attacks, he said.

In addition, "I don't think that the American public fully grasps the seriousness of this issue of cyber security."

"We've got to find a way to reach out and warn people, tell them what could possibly happen."

McKinley contends that the best the public can do right now is "to make sure they have the most current filter that you can and to make sure that they're working with their banks and other institutions that they do business with," so that "if there's something that's out of the ordinary, they're tipped off about it as quickly as possible."